using System;
using System.Text;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

namespace PTMedicalInsurance
{
    //class XmlHelper
    //{

    //}

    /// <summary>
    /// XML工具类
    /// </summary>
    public static class XmlHelper
    {
        /// <summary>
        /// 将一个对象序列化为XML字符串。这个方法将不生成XML文档声明头。
        /// </summary>
        /// <param name="o">要序列化的对象</param>
        /// <returns>序列化产生的XML字符串</returns>
        public static string XmlSerializerObject(object o)
        {
            Encoding encoding = Encoding.UTF8;
            XmlSerializer serializer = new XmlSerializer(o.GetType());
            using (MemoryStream stream = new MemoryStream())
            {
                XmlWriterSettings settings = new XmlWriterSettings();
                settings.Indent = true;
                settings.NewLineChars = "\r\n";
                settings.Encoding = encoding;
                settings.OmitXmlDeclaration = true;
                settings.IndentChars = "    ";

                XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
                ns.Add("", "");

                using (XmlWriter writer = XmlWriter.Create(stream, settings))
                {
                    serializer.Serialize(writer, o, ns);
                    writer.Close();
                }
                //return Encoding.UTF8.GetString(stream.ToArray());

                stream.Position = 0;
                using (StreamReader reader = new StreamReader(stream, encoding))
                {
                    return reader.ReadToEnd();
                }
            }
        }

        private static void XmlSerializeInternal(Stream stream, object o, Encoding encoding)
        {
            XmlSerializer serializer = new XmlSerializer(o.GetType());

            XmlWriterSettings settings = new XmlWriterSettings();
            settings.Indent = true;
            settings.NewLineChars = "\r\n";
            settings.Encoding = encoding;
            settings.IndentChars = "    ";

            using (XmlWriter writer = XmlWriter.Create(stream, settings))
            {
                serializer.Serialize(writer, o);
            }

        }

        /// <summary>
        /// 将一个对象序列化为XML字符串
        /// </summary>
        /// <param name="o">要序列化的对象</param>
        /// <param name="encoding">编码方式</param>
        /// <returns>序列化产生的XML字符串</returns>
        public static string XmlSerialize(object o, Encoding encoding)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                XmlSerializeInternal(stream, o, encoding);

                stream.Position = 0;
                using (StreamReader reader = new StreamReader(stream, encoding))
                {
                    return reader.ReadToEnd();
                }
            }
        }

        /// <summary>
        /// 将一个对象按XML序列化的方式写入到一个文件（采用UTF8编码）
        /// </summary>
        /// <param name="o">要序列化的对象</param>
        /// <param name="path">保存文件路径</param>
        public static void XmlSerializeToFile(object o, string path)
        {
            XmlSerializeToFile(o, path, Encoding.UTF8);
        }

        /// <summary>
        /// 将一个对象按XML序列化的方式写入到一个文件
        /// </summary>
        /// <param name="o">要序列化的对象</param>
        /// <param name="path">保存文件路径</param>
        /// <param name="encoding">编码方式</param>
        public static void XmlSerializeToFile(object o, string path, Encoding encoding)
        {
            using (FileStream file = new FileStream(path, FileMode.Create, FileAccess.Write))
            {
                XmlSerializeInternal(file, o, encoding);
            }
        }

        /// <summary>
        /// 从XML字符串流中反序列化对象
        /// </summary>
        /// <param name="stream">包含对象的XML字符串流</param>
        /// <param name="destType">要序列化的目标类型</param>
        /// <returns>反序列化得到的对象</returns>
        public static object XmlDeserialize(Stream stream, Type destType)
        {
            XmlSerializer mySerializer = new XmlSerializer(destType);
            using (StreamReader sr = new StreamReader(stream))
            {
                return mySerializer.Deserialize(sr);
            }
        }

        /// <summary>
        /// 从XML字符串中反序列化对象
        /// </summary>
        /// <param name="s">包含对象的XML字符串</param>
        /// <param name="destType">要序列化的目标类型</param>
        /// <param name="encoding">编码方式</param>
        /// <returns>反序列化得到的对象</returns>
        public static object XmlDeserialize(string s, Type destType, Encoding encoding)
        {
            using (MemoryStream ms = new MemoryStream(encoding.GetBytes(s)))
            {
                return XmlDeserialize(ms, destType);
            }
        }

        /// <summary>
        /// 从XML字符串中反序列化对象
        /// </summary>
        /// <typeparam name="T">结果对象类型</typeparam>
        /// <param name="s">包含对象的XML字符串</param>
        /// <returns>反序列化得到的对象</returns>
        public static T XmlDeserialize<T>(string s)
        {
            return (T)XmlDeserialize(s, typeof(T), Encoding.UTF8);
        }

        /// <summary>
        /// 读入一个文件，并按XML的方式反序列化对象。
        /// </summary>
        /// <typeparam name="T">结果对象类型</typeparam>
        /// <param name="path">文件路径</param>
        /// <returns>反序列化得到的对象</returns>
        public static T XmlDeserializeFromFile<T>(string path)
        {
            using (FileStream fs = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                return (T)XmlDeserialize(fs, typeof(T));
            }
        }

        public static T XmlDeserializeFromString<T>(string Str)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(Str);
            MemoryStream stream = new MemoryStream(bytes);
            //StreamReader reader = new StreamReader(stream);
            //string text = reader.ReadToEnd();
            return (T)XmlDeserialize(stream, typeof(T));
        }

        /// <summary>
        /// 获取XML跟节点的值
        /// </summary>
        /// <param name="path">文件路径</param>
        /// <returns></returns>
        public static string XmlGetElementName(string path)
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(path);
            return xmlDoc.DocumentElement.Name;
        }

        /// <summary>
        /// XML格式化
        /// </summary>
        /// <param name="xml"></param>
        /// <returns></returns>
        public static string FormatXml(string xml)
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.LoadXml(xml);

            using (StringWriter stringWriter = new StringWriter())
            {
                using (XmlTextWriter xmlTextWriter = new XmlTextWriter(stringWriter))
                {
                    xmlTextWriter.Formatting = Formatting.Indented;
                    xmlDoc.WriteContentTo(xmlTextWriter);
                    xmlTextWriter.Flush();
                    return stringWriter.ToString();
                }
            }
        }
    }
}